I bought a set of two 10ft cables. When connected to an RTX 3090, one of the cables supports 2160 @ 120 with HDR. the other not (limited to 60 Hz). Maybe the problem is with one of the cables, or maybe it's common and they're just not very good quality. There weren't many options at the time of purchase. Today I see many similar cables at the same prices that seem to have the best ratings, as well as better insulation and cable braiding. I've tried other brands and won't risk it with these.
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